Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive correlation indicate in a scatterplot?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation indicate in a scatterplot?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What does no correlation mean in a scatterplot?

Back

No correlation means there is no apparent relationship between the two variables; changes in one variable do not predict changes in the other.

Front

How can you identify a positive correlation in a scatterplot?

Back

A positive correlation is identified when the data points slope upwards from left to right.

Front

How can you identify a negative correlation in a scatterplot?

Back

A negative correlation is identified when the data points slope downwards from left to right.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure of the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What type of correlation is represented by the scatterplot of height vs. weight?

Back

Typically, height vs. weight shows a positive correlation.

Front

What type of correlation might you expect between the number of hours studied and test scores?

Back

You would generally expect a positive correlation between the number of hours studied and test scores.

Front

What type of correlation might you expect between the distance from school and test grades?

Back

You would generally expect no correlation between the distance from school and test grades.